CN202817852U - Charger temperature compensating circuit - Google Patents
Charger temperature compensating circuit Download PDFInfo
- Publication number
- CN202817852U CN202817852U CN 201220522556 CN201220522556U CN202817852U CN 202817852 U CN202817852 U CN 202817852U CN 201220522556 CN201220522556 CN 201220522556 CN 201220522556 U CN201220522556 U CN 201220522556U CN 202817852 U CN202817852 U CN 202817852U
- Authority
- CN
- China
- Prior art keywords
- voltage
- chgr
- output end
- voltage output
- reference source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to the technical field of chargers and especially relates to a charger temperature compensating circuit. The charger temperature compensating circuit structurally comprises a voltage reactive circuit. A reference terminal of a three-terminal adjustable shunting reference source Q1 in the voltage reactive circuit is connected with a thermistor the resistance of which changes along with the change of the temperature of a battery to be charged. Therefore, the voltage of the reference terminal of the three-terminal adjustable shunting reference source Q1 changes along with the change of the temperature of the battery to be charged. Meanwhile, the reference terminal of the three-terminal adjustable shunting reference source Q1 enables a drive switch to be conducted when a voltage of 2.5 V is obtained. Furthermore, an enable pin COMP of a PMW chip U1 is arranged at a low level so as to enable the PMW chip U1 to turn off the drive output, and for the time being, the voltage of a voltage output terminal CHGROUT is limited, thereby realizing the objective of temperature compensating in the charging process. Simultaneously, the charger temperature compensating circuit is simple in structure, low in cost, and easy to realize.
Description
Technical field
The utility model relates to the charger technical field, refers to especially a kind of charger temperature-compensation circuit.
Background technology
At present, lead acid accumulator is widely used, and ambient temperature is the primary factor that causes the maintenance-free lead accumulator equivalent life to shorten.When temperature raise, the storage battery electrolyte inside became more active, need to reduce charging voltage this moment, battery certainly will be brought into " overcharging " state if adopt fixedly the scheme of floating charge threshold values to charge the battery; In like manner, when ambient temperature was low, fixedly the charging scheme of floating charge threshold values can cause battery undervoltage: so long-time running all can reduce battery capacity and shorten battery life.So charger is adjusted float charge voltage automatically according to ambient temperature, namely auto thermal compensation is very important.And existing charger general structure complexity with automatic adjustment float charge voltage, the height of controlling cost is unfavorable for extensive enforcement.
Summary of the invention
The purpose of this utility model is to avoid above-mentioned weak point of the prior art and a kind of temperature-compensation circuit that can automatically adjust according to ambient temperature charging voltage simple in structure in charger is provided.
The purpose of this utility model is achieved through the following technical solutions:
A kind of charger temperature-compensation circuit is provided, comprise voltage output end CHGR OUT and the voltage feedback circuit that is connected with voltage output end CHGR OUT, described voltage feedback circuit comprises the PWM chip U1 for the control charging voltage, anode connects that power supply ground and negative electrode meet the three end adjustable shunt reference source Q1 of voltage output end CHGR OUT and by the switch of three end adjustable shunt reference source Q1 control conducting/disconnection, two outputs of described switch connect respectively enable pin COMP and the power supply ground of PWM chip U1, be connected with resistance R 3 between the reference utmost point of described three end adjustable shunt reference source Q1 and the anode, be in series with NTC thermistor Rntc and resistance R 2 with battery thermal coupling to be charged between described resistance R 3 and the voltage output end CHGR OUT.
A kind of charger temperature-compensation circuit perhaps is provided, comprise voltage output end CHGR OUT and the voltage feedback circuit that is connected with voltage output end CHGR OUT, described voltage feedback circuit comprises the PWM chip U1 for the control charging voltage, anode connects that power supply ground and negative electrode meet the three end adjustable shunt reference source Q1 of voltage output end CHGR OUT and by the switch of three end adjustable shunt reference source Q1 control conducting/disconnection, two outputs of described switch connect respectively enable pin COMP and the power supply ground of PWM chip U1, be connected with resistance R 3 between the reference utmost point of described three end adjustable shunt reference source Q1 and the anode, described resistance R 3 is parallel with the PTC thermistor Rptc with battery thermal coupling to be charged, is in series with resistance R 2 between described PTC thermistor Rptc and the voltage output end CHGR OUT.
Wherein, described switch is optocoupler U2, the photophore of described optocoupler U2 is series between the negative electrode of voltage output end CHGR OUT and three end adjustable shunt reference source Q1, and the light-receiving device of described optocoupler U2 is series between the enable pin COMP and power supply ground of PWM chip U1.
The beneficial effects of the utility model: a kind of charger temperature-compensation circuit is provided, comprise voltage feedback circuit, the reference edge of three end adjustable shunt reference source Q1 in the voltage feedback circuit is connected with the thermistor that resistance changes with battery temperature to be charged, therefore the voltage of the reference edge of three end adjustable shunt reference source Q1 changes with battery temperature to be charged, the reference edge of three end adjustable shunt reference source Q1 makes the driving switch conducting when voltage obtains 2.5V voltage simultaneously, and then the enable pin COMP of PWM chip U1 set low level so that PWM chip U1 closes driver output, limit the voltage of voltage output end CHGR OUT this moment, thereby in charging process, reach the purpose in temperature-compensating.This circuit structure is simple simultaneously, and is with low cost, realizes easily, only needs slightly to adjust on original charger basis, can directly use at common charger, applied widely, practical.
Description of drawings
The utility model is described in further detail to utilize accompanying drawing, but the embodiment in the accompanying drawing does not consist of any restriction of the present utility model, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain according to the following drawings other accompanying drawing.
Fig. 1 is the circuit diagram of the embodiment 1 of a kind of charger temperature-compensation circuit of the utility model.
Fig. 2 is the circuit diagram of the embodiment 2 of a kind of charger temperature-compensation circuit of the utility model.
Embodiment
With the following Examples the utility model is further described.
Embodiment 1
One of embodiment of the embodiment 1 of a kind of charger temperature-compensation circuit of the utility model, as shown in Figure 1, comprise: voltage output end CHGR OUT and the voltage feedback circuit that is connected with voltage output end CHGR OUT, described voltage feedback circuit comprises the PWM chip U1 for the control charging voltage, anode meets three end adjustable shunt reference source Q1 and the optocoupler U2 on power supply ground, the photophore of described optocoupler U2 is series between the negative electrode of voltage output end CHGR OUT and three end adjustable shunt reference source Q1, the light-receiving device of described optocoupler U2 is series between the enable pin COMP and power supply ground of PWM chip U1, series resistance R1 between the photophore of described optocoupler U2 and the voltage output end CHGR OUT, be connected with resistance R 3 between the reference utmost point of described three end adjustable shunt reference source Q1 and the anode, be in series with NTC thermistor Rntc and resistance R 2 with battery thermal coupling to be charged between described resistance R 3 and the voltage output end CHGR OUT.
In this circuit, when the reference pole tension of three end adjustable shunt reference source Q1 is 2.5V, optocoupler U1 conducting, the enable pin COMP of PWM chip U1 is set to low level, and PWM chip U1 closes driver output, and output voltage no longer raises.Namely the reference pole tension of three end adjustable shunt reference source Q1 is 2.5V when output voltage stabilization.Therefore the final output voltage of voltage output end CHGR OUT as can be seen from Figure 1
, therefore when battery temperature to be charged raise, the resistance of thermistor Rntc reduced, and the final output voltage of voltage output end CHGR OUT reduces; When battery temperature to be charged reduced, the resistance of thermistor Rntc increased, and the final output voltage of voltage output end CHGR OUT increases.
Embodiment 2
Two of the embodiment of a kind of charger temperature-compensation circuit of the utility model, the main technical schemes of present embodiment is identical with embodiment 1, and unaccounted feature adopts the explanation among the embodiment 1 in the present embodiment, is not repeated herein.The difference of present embodiment and embodiment 1 is, states resistance R 3 and is parallel with PTC thermistor Rptc with battery thermal coupling to be charged, is in series with resistance R 2 between described PTC thermistor Rptc and the voltage output end CHGR OUT.
In like manner, when output voltage stabilization be that the reference pole tension of three end adjustable shunt reference source Q1 is 2.5V.Therefore the final output voltage of voltage output end CHGR OUT as can be seen from Figure 2
, therefore when battery temperature to be charged raise, the resistance of thermistor Rptc increased, and the final output voltage of voltage output end CHGR OUT reduces; When battery temperature to be charged reduced, the resistance of thermistor Rptc reduced, and the final output voltage of voltage output end CHGR OUT increases.
Should be noted that at last; above embodiment is only in order to illustrate the technical solution of the utility model; but not to the restriction of the utility model protection range; although with reference to preferred embodiment the utility model has been done to explain; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from essence and the scope of technical solutions of the utility model.
Claims (4)
1. charger temperature-compensation circuit, comprise voltage output end CHGR OUT and the voltage feedback circuit that is connected with voltage output end CHGR OUT, described voltage feedback circuit comprises the PWM chip U1 for the control charging voltage, anode connects that power supply ground and negative electrode meet the three end adjustable shunt reference source Q1 of voltage output end CHGR OUT and by the switch of three end adjustable shunt reference source Q1 control conducting/disconnection, two outputs of described switch connect respectively enable pin COMP and the power supply ground of PWM chip U1, it is characterized in that: be connected with resistance R 3 between the reference utmost point of described three end adjustable shunt reference source Q1 and the anode, be in series with the NTC thermistor Rntc with battery thermal coupling to be charged between described resistance R 3 and the voltage output end CHGR OUT.
2. a kind of charger temperature-compensation circuit as claimed in claim 1, it is characterized in that: described switch is optocoupler U2, the photophore of described optocoupler U2 is series between the negative electrode of voltage output end CHGR OUT and three end adjustable shunt reference source Q1.
3. charger temperature-compensation circuit, comprise voltage output end CHGR OUT and the voltage feedback circuit that is connected with voltage output end CHGR OUT, described voltage feedback circuit comprises the PWM chip U1 for the control charging voltage, anode connects that power supply ground and negative electrode meet the three end adjustable shunt reference source Q1 of voltage output end CHGR OUT and by the switch of three end adjustable shunt reference source Q1 control conducting/disconnection, two outputs of described switch connect respectively enable pin COMP and the power supply ground of PWM chip U1, it is characterized in that: be connected with resistance R 3 between the reference utmost point of described three end adjustable shunt reference source Q1 and the anode, described resistance R 3 is parallel with the PTC thermistor Rptc with battery thermal coupling to be charged, is in series with resistance R 2 between described PTC thermistor Rptc and the voltage output end CHGR OUT.
4. a kind of charger temperature-compensation circuit as claimed in claim 3, it is characterized in that: described switch is optocoupler U2, the photophore of described optocoupler U2 is series between the negative electrode of voltage output end CHGR OUT and three end adjustable shunt reference source Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220522556 CN202817852U (en) | 2012-10-12 | 2012-10-12 | Charger temperature compensating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220522556 CN202817852U (en) | 2012-10-12 | 2012-10-12 | Charger temperature compensating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202817852U true CN202817852U (en) | 2013-03-20 |
Family
ID=47876665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220522556 Expired - Lifetime CN202817852U (en) | 2012-10-12 | 2012-10-12 | Charger temperature compensating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202817852U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356587A (en) * | 2015-09-14 | 2016-02-24 | 深圳市汇业达通讯技术有限公司 | Distribution network power supply apparatus |
| CN109287049A (en) * | 2018-10-16 | 2019-01-29 | 中国航发南方工业有限公司 | Formation light temperature drift compensation circuit, formation lamp control circuit and formation lamp control device |
-
2012
- 2012-10-12 CN CN 201220522556 patent/CN202817852U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356587A (en) * | 2015-09-14 | 2016-02-24 | 深圳市汇业达通讯技术有限公司 | Distribution network power supply apparatus |
| CN105356587B (en) * | 2015-09-14 | 2018-07-17 | 深圳市汇业达通讯技术有限公司 | A kind of distribution supply unit |
| CN109287049A (en) * | 2018-10-16 | 2019-01-29 | 中国航发南方工业有限公司 | Formation light temperature drift compensation circuit, formation lamp control circuit and formation lamp control device |
| CN109287049B (en) * | 2018-10-16 | 2019-12-27 | 中国航发南方工业有限公司 | Formation lamp temperature drift compensation circuit, formation lamp control circuit and formation lamp control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9882411B2 (en) | Lithium-ion battery and charge/discharge control method | |
| CN202817852U (en) | Charger temperature compensating circuit | |
| CN203553909U (en) | Self-powered storage-battery overcharge protection circuit | |
| CN103683419A (en) | Lithium battery charger capable of identifying high or low voltages automatically | |
| CN102290846B (en) | Impedance type constant-voltage charging circuit with variable negative temperature coefficients | |
| CN104218648A (en) | Charging and discharging protection circuit and charging and discharging system | |
| CN203707855U (en) | Lithium battery pack equalization charger | |
| CN103633718A (en) | Hybrid feedback type charging circuit, charger and charging method | |
| CN203071625U (en) | Self-discharge consistency adjusting circuit of series battery, and battery pack | |
| CN202127240U (en) | Overcharging and over-discharging protection circuit of lithium battery | |
| CN208782474U (en) | The anti-firing circuit of power connection and the power supply with the circuit | |
| CN202978322U (en) | Charging control circuit for plumbic acid power battery group | |
| CN205945120U (en) | Automatic charger of solar energy | |
| CN103779839B (en) | A kind of automatic shutoff start-up circuit adopting rechargeable battery to power | |
| CN202997654U (en) | Constant-voltage constant-current charging circuit | |
| CN105743188A (en) | Plumbic acid battery pack protection system | |
| CN106329587A (en) | Circuit used for non-contact induction energy transmission system | |
| CN106208170A (en) | Electrokinetic cell follows the tracks of feedback charge control system | |
| CN204794196U (en) | Balanced control system of group battery initiative | |
| CN205544416U (en) | Intelligence anti -overcharging charger circuit | |
| CN103228079A (en) | Solar street lamp controller with temperature compensation function | |
| CN215185985U (en) | Intelligent charge and discharge control system for solar LED screen | |
| CN206099451U (en) | Battery controlling means that charges based on voltage stabilizing circuit | |
| CN218526127U (en) | Constant voltage and constant current circuit realized by utilizing switching technology | |
| CN210016273U (en) | Battery pack under-voltage protection circuit with hysteresis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 523808 No. 6 industrial North Road, Songshan Lake Science and Technology Industrial Park, Dongguan, Guangdong Patentee after: EAST GROUP Co.,Ltd. Address before: 523808 No. 6 industrial North Road, Songshan Lake Science and Technology Industrial Park, Dongguan, Guangdong Patentee before: GUANGDONG EAST POWER Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180531 Address after: 030000 Shui Xiu Industrial Park, Shui Xiu Township, Taigu County, Jinzhong, Shanxi Patentee after: Shanxi Jinlu EAST new energy Co.,Ltd. Address before: 523808 No. 6 industrial North Road, Songshan Lake Science and Technology Industrial Park, Dongguan, Guangdong Patentee before: EAST GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181022 Address after: 523000 No. 6 industrial North Road, Songshan Lake Science and Technology Industrial Park, Dongguan, Guangdong Patentee after: EAST GROUP Co.,Ltd. Address before: 030000 Shui Xiu Industrial Park, Shui Xiu Township, Taigu County, Jinzhong, Shanxi Patentee before: Shanxi Jinlu EAST new energy Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |
|
| CX01 | Expiry of patent term |